Rear projection type optical image detection device for monitoring quality of printed matter in real time

Abstract

The utility model discloses a rear projection type optical image detection device for real-time monitoring of quality of printed matters, which comprises a box body, a light assembly, an amplification detection mechanism and a copy shooting mechanism, the top surface of the box body is of an opening structure, and a detection plate matched with the opening is arranged in the opening; the amplification detection mechanism comprises a sliding rail, a supporting rod, a rotating seat, a first connecting rod, a second connecting rod and an amplification observation mirror, and the copy shooting mechanism comprises a first sliding rod, a second sliding rod, a mounting rod and a camera. According to the utility model, the box body, the light assembly, the amplification detection mechanism and the copy shooting mechanism are combined for use, so that backlight projection can be carried out on patterns or gilding of spot check presswork, the patterns or gilding cannot reflect light, the plurality of LED lamp modules independently control gear shifting, and the irradiation on key parts can be enhanced; in the backlight irradiation period, the amplification detection mechanism can be used for carrying out amplification observation on the printing and gold stamping part, and the copy shooting mechanism can be used for shooting and copying the defective printed matter, so that defective products in the printed matter can be effectively reduced, and the production quality and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the field of printed product quality detection, in particular to a rear projection optical image detection device for real-time monitoring of printed product quality. Background Art

[0002] In the printing industry, the quality of printed products is measured by whether they can reproduce the original manuscript faithfully. However, due to the imperfection of existing printing technology and unavoidable random factors, printed products often have various defects. The quality inspection of traditional printed images is done manually, which is time-consuming and labor-intensive.

[0003] With the development of technology, image measurement technology is gradually used to detect the printing quality of printed materials. The image measuring instrument currently used is a high-precision, high-efficiency photoelectric measuring instrument composed of precision mechanical structures such as high-resolution CCD color camera, continuously variable magnification objective lens, precision optical ruler, multi-function processor, 2D data measurement software and high-precision workbench. Its principle is to store the original standard pattern of the printed material in the controller, and then the high-speed camera shoots the printed product and converts the collected image signal into an electrical signal in the controller, which is then compared with the standard pattern signal pre-collected in the controller for detection and comparison.

[0004] However, most of the existing equipment uses forward light irradiation when collecting printed image information, and then a high-speed camera collects the hot stamping or printed image on the front for comparison. This collection method is not easy to segment the image processing when the background color of the substrate is similar to the hot stamping gold, which will cause inaccurate detection; and when the object moves slightly unsteadily or has ups and downs, the reflection direction of the hot stamping will change, and the unstable reflection effect will also cause inaccurate detection. Therefore, a device is needed that can perform secondary backlight detection on printed materials after image detection to reduce the inaccurate detection due to pattern or hot stamping reflection. Summary of the invention

[0005] In order to solve the above problems, the utility model provides a rear-projection optical image detection device for real-time monitoring of printed product quality without causing hot stamping reflection during detection.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rear-projection optical image detection device for real-time monitoring of the quality of printed materials, comprising a box body, a lighting assembly, an amplification detection mechanism and a bottom-retaining shooting mechanism, the top surface of the box body is an open structure, and a detection board adapted thereto is installed in the opening, and the detection board is a transparent glass plate, the lighting assembly is installed on the bottom of the box body, and the lighting assembly is composed of a plurality of LED light modules arranged equidistantly, and each LED light module is controlled by an independent switch to be turned on and off and to adjust the gear position.

[0007] The magnifying detection mechanism includes a slide rail, a support rod, a rotating seat, a first connecting rod, a second connecting rod and a magnifying observation mirror. The slide rail is installed on the upper front end surface of the box body. The support rod is a telescopic structure, and its bottom is slidably connected to the slide rail by a slider. The rotating seat is installed on the upper part of the support rod. One end of the first connecting rod is provided with a rotating shaft structure connected to the outer peripheral surface of the rotating seat, and the other end is also connected to one end of the second connecting rod through the rotating shaft structure. The magnifying observation mirror is connected to the end of the second connecting rod through a universal joint.

[0008] The bottom-capturing shooting mechanism includes a first sliding rod, a second sliding rod, a mounting rod and a camera. The number of the first sliding rods is two, which are respectively mounted on the left and right sides of the frame of the top surface of the box bottom through a mounting seat. The second sliding rod is composed of two single rods in parallel. The bottoms of both ends of the second sliding rod are respectively slidably connected to the first sliding rods on the left and right sides by sliders. The mounting rod is a retractable structure, and its bottom surface is slidably connected to the second sliding rod through a slider. A camera clip cover is installed on the top surface. The camera is arranged in the camera clip cover and is detachably connected to the camera clip cover.

[0009] As an optimization scheme for this case, a detachable movable mechanism is provided at the bottom of the box, and the movable mechanism includes a mounting groove plate, a clamping rod and a support leg. The mounting groove plate is a "concave" plate, and the spacing between the groove edges on both sides is the same as the width of the box and is sleeved on the bottom of the box. 1-3 clamping holes are also provided on the end face of the groove edge, and an internal thread structure is provided in the clamping hole. The number of the clamping rods is the same as the number of the clamping holes. A rotating knob is installed at one end of the clamping rod, and a spherical silicone pad is installed at the other end. An external thread structure that matches the internal thread of the clamping hole is provided on the rod body of the clamping rod, and is connected to the clamping hole through a secondary structure. There are four support legs, which are respectively installed at the four inner corners of the bottom of the box, and a universal wheel with a limiting mechanism is installed at the bottom of the leg.

[0010] Furthermore, the legs of the moving mechanism are telescopic structures.

[0011] Furthermore, a scale is provided on the end surface of the frame of the top surface of the box body.

[0012] Beneficial effects: 1. The utility model is used in combination with a box body, a lighting assembly, a magnifying detection mechanism and a record-keeping shooting mechanism, which can perform backlight projection on the pattern or hot stamping of the randomly checked printed matter so that it will not reflect light. Multiple LED light modules can independently control the adjustment gear to strengthen the illumination of key areas. During the backlight illumination, the magnifying detection mechanism can also be used to magnify and observe the printed hot stamping areas. The record-keeping shooting mechanism can also be used to photograph and keep records of defective printed matters, which can effectively reduce the number of defective printed matters and improve production quality and efficiency.

[0013] ②. The magnifying glass and camera of the magnifying detection mechanism and the record-keeping photography mechanism in the utility model can move in all directions above the detection board, and can magnify and take photos of the printed materials of the detection board without blind spots, which is convenient for the detection personnel to observe and effectively improves the speed and accuracy of the detection.

[0014] ③. The utility model is provided with a detachable mobile mechanism under the box body, which can be installed when needed, thereby improving the portability and applicability of the device and reducing the intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0017] Figure 3 It is a structural schematic diagram of the amplification detection mechanism in the utility model.

[0018] Figure 4 It is a structural schematic diagram of the bottom-retaining photographing mechanism in the utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the utility model in Example 2.

[0020] Figure 6 for Figure 5 Schematic diagram of the top view structure.

[0021] Figure 7 It is a structural schematic diagram of the moving mechanism in the utility model.

[0022] In the figure: 1. box; 2. lighting assembly; 3. slide rail; 4. support rod; 5. swivel seat; 6. first connecting rod; 7. second connecting rod; 8. magnifying observation mirror; 9. universal joint; 10. first sliding rod; 11. second sliding rod; 12. mounting rod; 13. camera clamp; 14. mounting slot plate; 15. clamping rod; 16. supporting leg; 17. scale. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] The same zero mechanism is represented by the same figure mark. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific mechanism, respectively. The drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. Example 1

[0025] like Figure 1-4 As shown, this embodiment discloses a rear projection optical image detection device for real-time monitoring of printed product quality, which is used to perform backlight testing on printed products, and specifically includes a box 1, a light assembly 2, an amplification detection mechanism and a back-retention shooting mechanism, see Figure 1 The top surface of the box body 1 is an open structure, and a detection plate adapted thereto is installed in the opening. The detection plate is a transparent glass plate. Figure 1 and Figure 2 It can be seen that the lighting assembly is installed on the bottom of the box 1, and the lighting assembly is composed of a plurality of LED light modules arranged equidistantly, and each LED light module is controlled by an independent switch to be turned on and off and to adjust the gear position.

[0026] See also Figure 1 , Figure 2 and Figure 3 The magnifying detection mechanism includes a slide rail 3, a support rod 4, a rotating seat 5, a first connecting rod 6, a second connecting rod 7 and a magnifying observation mirror 8. Figure 1 and Figure 2 It can be seen that the slide rail 3 is installed on the upper front end of the box body 1, and the support rod 4 is a retractable structure, and its bottom is slidably connected to the slide rail 3 by a slider. For specific structure, see Figure 3 The rotating seat 5 is installed on the upper part of the support rod 4, one end of the first connecting rod 6 is provided with a rotating shaft structure connected to the outer circumferential surface of the rotating seat 5, and the other end is also connected to one end of the second connecting rod 7 through the rotating shaft structure, and the magnifying observation glass 8 is connected to the end of the second connecting rod 7 through a universal joint 9.

[0027] See also Figure 1 , Figure 2 and Figure 4 The bottom-retaining shooting mechanism includes a first sliding rod 10, a second sliding rod 11, a mounting rod 12 and a camera. Figure 1 and Figure 4 It can be seen that the number of the first sliding rods 10 is two, which are respectively mounted on the left and right sides of the top frame of the box bottom through the mounting base, see Figure 1 The second sliding rod is composed of two single rods in parallel, and the bottoms of both ends of the second sliding rod are slidingly connected to the first sliding rods on the left and right sides by sliders respectively. The mounting rod 12 is a retractable structure, and its bottom surface is slidingly connected to the second sliding rod through a slider, and a camera clip 13 is installed on the top surface. The camera is arranged in the camera clip 13 and is detachably connected to the camera clip 13. Example 2

[0028] See also Figure 3-7The specific structure and implementation method are the same as those in Example 1, except that a detachable moving mechanism is provided below the box body 1, see Figure 7 The moving mechanism includes a mounting slot plate 14, a clamping rod 15 and a leg 16. Figure 5 It can be seen that the mounting groove plate 14 is a "concave" plate, the spacing between the groove edges on both sides of the plate is the same as the width of the box body 1 and is sleeved on the bottom of the box body 1. There are 1-3 clamping holes on the end face of the groove edge, and an internal thread structure is provided in the clamping hole.

[0029] See also Figure 5 and Figure 7 The number of the clamping rods 15 is the same as the number of the clamping holes. A rotating knob is installed at one end of the clamping rod 15, and a spherical silicone pad is installed at the other end. The rod body of the clamping rod 15 is provided with an external thread structure that matches the internal thread of the clamping hole, and is connected to the clamping hole through a secondary structure. The number of the legs 16 is four, which are respectively installed at the four inner corners of the bottom of the box body 1, and a universal wheel with a limiting mechanism is installed at the bottom of the legs 16.

[0030] from Figure 5 and Figure 6 It can be seen that the legs 16 of the moving mechanism are of a telescopic structure, and a scale 17 is provided on the end surface of the frame of the top surface of the box body 1.

[0031] When in use, place the box 1 in the mounting slot plate 14 of the moving mechanism, use the clamping rod 15 to rotate, clamp and lock it, then place the printed matter to be inspected on the inspection plate, turn on the lighting assembly 2 to perform backlight projection on the pattern or hot stamping of the spot-checked printed matter, and since the light source does not directly illuminate the hot stamping pattern, no reflection will occur. During this period, multiple LED light modules independently control the adjustment to strengthen the illumination of key areas, and then adjust the various components of the magnifying detection mechanism to adjust the magnifying observation mirror 8 to a suitable position, and then magnify and observe the printed hot stamping area. When defects are found, adjust the various components of the backup shooting mechanism to shoot the area for backup.

[0032] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A rear projection optical image detection device for real-time monitoring of printed matter quality, comprising a housing (1), a lighting assembly (2), an amplification detection mechanism and a back-up photography mechanism, characterized in that: The top surface of the box (1) is an open structure, and a detection plate adapted thereto is installed in the opening, and the detection plate is a transparent glass plate. The lighting assembly is installed on the bottom of the box (1), and the lighting assembly is composed of a plurality of LED light modules arranged at equal distances, and each LED light module is controlled by an independent switch to be turned on and off and to adjust the gear position; The magnifying detection mechanism comprises a slide rail (3), a support rod (4), a rotating seat (5), a first connecting rod (6), a second connecting rod (7) and a magnifying observation mirror (8), wherein the slide rail (3) is mounted on the upper front end surface of the box body (1), the support rod (4) is a telescopic structure, the bottom of which is slidably connected to the slide rail (3) by a slider, the rotating seat (5) is mounted on the upper part of the support rod (4), one end of the first connecting rod (6) is provided with a rotating shaft structure connected to the outer peripheral surface of the rotating seat (5), and the other end is also connected to one end of the second connecting rod (7) through the rotating shaft structure, and the magnifying observation mirror (8) is connected to the end of the second connecting rod (7) through a universal joint (9); The bottom-retaining shooting mechanism comprises a first sliding rod (10), a second sliding rod (11), a mounting rod (12) and a camera. The first sliding rod (10) is two in number and is respectively mounted on the left and right sides of the frame of the top surface of the box bottom through a mounting seat. The second sliding rod is composed of two single rods arranged in parallel. The bottoms of both ends of the second sliding rod are respectively connected to the first sliding rods on the left and right sides by sliding blocks. The mounting rod (12) is a retractable structure. Its bottom surface is connected to the second sliding rod by sliding blocks. A camera jacket (13) is installed on the top surface. The camera is arranged in the camera jacket (13) and is detachably connected to the camera jacket (13).

2. The rear projection optical image detection device for real-time monitoring of printed matter quality according to claim 1, characterized in that: A detachably mounted moving mechanism is provided below the box body (1), the moving mechanism comprising a mounting groove plate (14), a clamping rod (15) and a support leg (16). The mounting groove plate (14) is a "concave" plate, the spacing between the groove edges on both sides of the mounting groove plate is the same as the width of the box body (1) and the mounting groove plate is sleeved on the bottom of the box body (1). One to three clamping holes are also provided on the end surface of the groove edge, and an internal thread structure is provided in the clamping hole. The number of the clamping rods (15) is the same as the number of the clamping holes. A rotating knob is provided at one end of the clamping rod (15), and a spherical silicone pad is provided at the other end. An external thread structure that matches the internal thread of the clamping hole is provided on the rod body of the clamping rod (15), and the external thread structure is connected to the clamping hole through a secondary structure. The number of the support legs (16) is four, which are respectively installed at the four inner corners of the bottom of the box body (1). A universal wheel with a limiting mechanism is installed at the bottom of the support leg (16).

3. The rear projection optical image detection device for real-time monitoring of printed matter quality according to claim 2, characterized in that: The supporting legs (16) of the moving mechanism are of telescopic structure.

4. A rear-projection optical image detection device for real-time monitoring of printed matter quality according to any one of claims 1 to 3, characterized in that: A scale (17) is provided on the end surface of the frame of the top surface of the box body (1).

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